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visual-tactile_integration [2010/05/01 01:13]
sarahsolomon
visual-tactile_integration [2010/05/20 08:40] (current)
sarahsolomon
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 ====The Experiment==== ====The Experiment====
  
-The experiment was based upon the "​arc-circle test", and involved subjects'​ judgment on the relative size of circles and arcs, which were presented in either the visual or tactile modality. ​+The experiment was based upon the "​arc-circle test", and involved subjects'​ judgment on the relative size of circles and arcs, which were presented in either the visual or tactile modality. Two conditions were measured:  
 +  *Visual-Visual Condition: subjects were presented with a visual display consisted of an arc and four circles of differing sizes. Subjects had to match the arc to the circle of the same size. Subjects touched metal arcs during this condition such that tactile primary areas would be activated in both conditions.  
 +  *Visual-Tactile Condition: Subjects were presented with a visual display consisting of four circles of differing sizes. They were presented with metal arcs on a platform that the subjects could not see. Subjects were required to feel the arcs with their hands, and match each arc to the correct circle displayed on the screen
  
-===Conditions===+Activation measured in the Visual-Visual Condition was substracted from the activation measured in the Visual-Tactile Condition, with the intention to isolate the brain regions active in the cross-modal element of the task. 
  
  
 ====Results==== ====Results====
  
-After analysis of the PET scans, Banati et al (2000) determined that the anatomical regions involved in the cross-modal task are the anterior cingulate cortex, inferior parietal lobules, the left dorsolateral prefrontal cortex (DLPFC) and the left claustrum/​insular cortex. Even if one does not know the exact location or function of these regions, the important point is that these regions are known to be of the [[Terms and Definitions|heteromodal]] type, and thus are already ​thought to be implicated ​in multi-modal processing. ​+After analysis of the PET scans, Banati et al (2000) determined that the anatomical regions involved in the cross-modal task are the anterior cingulate cortex, inferior parietal lobules, the left dorsolateral prefrontal cortex (DLPFC) and the left claustrum/​insular cortex. Even if one does not know the exact location or function of these regions, the important point is that these regions are known to be of the [[Terms and Definitions|heteromodal]] type or the [[Terms and Definitions|supramodal]] type (as in the DLPFC), and thus are already in an optimal position to undergo ​multi-modal processing, as these regions receive inputs from more than one modal system
  
 Back to [[Multi-Modal Integration]]\\ Back to [[Multi-Modal Integration]]\\
 [[Sensory Integration|Back to Main]] [[Sensory Integration|Back to Main]]